/** @file
  Translate the port number into a service name

  Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <Uefi.h>
#include <unistd.h>

#include <arpa/nameser.h>
#include <arpa/nameser_compat.h>

#include <Library/DebugLib.h>
#include <Library/UefiLib.h>

#include <sys/socket.h>

/**
  Translate the IP address into a host name

  @param[in] Argc   The number of arguments
  @param[in] Argv   The argument value array

  @retval  0        The application exited normally.
  @retval  Other    An error occurred.
**/
int
main (
  IN int Argc,
  IN char **Argv
  )
{
  UINTN Index;
  UINT8 IpAddress[4];
  struct hostent * pHost;
  UINT8 * pIpAddress;
  char ** ppName;
  UINT32 RemoteAddress[4];

  //
  //  Determine if the IPv4 address is specified
  //
  if (( 2 != Argc )
    || ( 4 != sscanf ( Argv[1],
                       "%d.%d.%d.%d",
                       &RemoteAddress[0],
                       &RemoteAddress[1],
                       &RemoteAddress[2],
                       &RemoteAddress[3]))
    || ( 255 < RemoteAddress[0])
    || ( 255 < RemoteAddress[1])
    || ( 255 < RemoteAddress[2])
    || ( 255 < RemoteAddress[3])) {
    Print ( L"%a  <IPv4 Address>\r\n", Argv[0]);
  }
  else {
    //
    //  Translate the address into a host name
    //
    IpAddress[0] = (UINT8)RemoteAddress[0];
    IpAddress[1] = (UINT8)RemoteAddress[1];
    IpAddress[2] = (UINT8)RemoteAddress[2];
    IpAddress[3] = (UINT8)RemoteAddress[3];
    pHost = gethostbyaddr ( (const char *)&IpAddress[0], INADDRSZ, AF_INET );
    if ( NULL == pHost ) {
      Print ( L"ERROR - host not found, h_errno: %d\r\n", h_errno );
    }
    else {
      pIpAddress = (UINT8 *)pHost->h_addr_list[ 0 ];
      Print ( L"%d.%d.%d.%d, %a\r\n",
              pIpAddress[0],
              pIpAddress[1],
              pIpAddress[2],
              pIpAddress[3],
              pHost->h_name );

      //
      //  Display the other addresses
      //
      for ( Index = 1; NULL != pHost->h_addr_list[Index]; Index++ ) {
        pIpAddress = (UINT8 *)pHost->h_addr_list[Index];
        Print ( L"%d.%d.%d.%d\r\n",
                pIpAddress[0],
                pIpAddress[1],
                pIpAddress[2],
                pIpAddress[3]);
      }

      //
      //  Display the list of aliases
      //
      ppName = pHost->h_aliases;
      if (( NULL == ppName ) || ( NULL == *ppName )) {
        Print ( L"No aliases\r\n" );
      }
      else {
        Print ( L"Aliases: " );
        while ( NULL != *ppName ) {
          //
          //  Display the alias
          //
          Print ( L"%a", *ppName );

          //
          //  Set the next alias
          //
          ppName += 1;
          if ( NULL != *ppName ) {
            Print ( L", " );
          }
        }
        Print ( L"\r\n" );
      }
    }
  }

  //
  //  All done
  //
  return errno;
}
